// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)

#pragma once

#ifndef SPDLOG_HEADER_ONLY
#include <spdlog/sinks/ansicolor_sink.h>
#endif

#include <spdlog/details/os.h>
#include <spdlog/pattern_formatter.h>

namespace spdlog {
namespace sinks {

    template <typename ConsoleMutex>
    SPDLOG_INLINE ansicolor_sink<ConsoleMutex>::ansicolor_sink(FILE* target_file, color_mode mode)
        : target_file_(target_file), mutex_(ConsoleMutex::mutex()), formatter_(details::make_unique<spdlog::pattern_formatter>())

    {
        set_color_mode(mode);
        colors_.at(level::trace) = to_string_(white);
        colors_.at(level::debug) = to_string_(cyan);
        colors_.at(level::info) = to_string_(green);
        colors_.at(level::warn) = to_string_(yellow_bold);
        colors_.at(level::err) = to_string_(red_bold);
        colors_.at(level::critical) = to_string_(bold_on_red);
        colors_.at(level::off) = to_string_(reset);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::set_color(level::level_enum color_level, string_view_t color)
    {
        std::lock_guard<mutex_t> lock(mutex_);
        colors_.at(static_cast<size_t>(color_level)) = to_string_(color);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::log(const details::log_msg& msg)
    {
        // Wrap the originally formatted message in color codes.
        // If color is not supported in the terminal, log as is instead.
        std::lock_guard<mutex_t> lock(mutex_);
        msg.color_range_start = 0;
        msg.color_range_end = 0;
        memory_buf_t formatted;
        formatter_->format(msg, formatted);
        if (should_do_colors_ && msg.color_range_end > msg.color_range_start)
        {
            // before color range
            print_range_(formatted, 0, msg.color_range_start);
            // in color range
            print_ccode_(colors_.at(static_cast<size_t>(msg.level)));
            print_range_(formatted, msg.color_range_start, msg.color_range_end);
            print_ccode_(reset);
            // after color range
            print_range_(formatted, msg.color_range_end, formatted.size());
        }
        else  // no color
        {
            print_range_(formatted, 0, formatted.size());
        }
        fflush(target_file_);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::flush()
    {
        std::lock_guard<mutex_t> lock(mutex_);
        fflush(target_file_);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::set_pattern(const std::string& pattern)
    {
        std::lock_guard<mutex_t> lock(mutex_);
        formatter_ = std::unique_ptr<spdlog::formatter>(new pattern_formatter(pattern));
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::set_formatter(std::unique_ptr<spdlog::formatter> sink_formatter)
    {
        std::lock_guard<mutex_t> lock(mutex_);
        formatter_ = std::move(sink_formatter);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE bool ansicolor_sink<ConsoleMutex>::should_color() { return should_do_colors_; }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::set_color_mode(color_mode mode)
    {
        switch (mode)
        {
        case color_mode::always:
            should_do_colors_ = true;
            return;
        case color_mode::automatic:
            should_do_colors_ = details::os::in_terminal(target_file_) && details::os::is_color_terminal();
            return;
        case color_mode::never:
            should_do_colors_ = false;
            return;
        default:
            should_do_colors_ = false;
        }
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::print_ccode_(const string_view_t& color_code)
    {
        fwrite(color_code.data(), sizeof(char), color_code.size(), target_file_);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE void ansicolor_sink<ConsoleMutex>::print_range_(const memory_buf_t& formatted, size_t start, size_t end)
    {
        fwrite(formatted.data() + start, sizeof(char), end - start, target_file_);
    }

    template <typename ConsoleMutex> SPDLOG_INLINE std::string ansicolor_sink<ConsoleMutex>::to_string_(const string_view_t& sv)
    {
        return std::string(sv.data(), sv.size());
    }

    // ansicolor_stdout_sink
    template <typename ConsoleMutex>
    SPDLOG_INLINE ansicolor_stdout_sink<ConsoleMutex>::ansicolor_stdout_sink(color_mode mode) : ansicolor_sink<ConsoleMutex>(stdout, mode)
    {
    }

    // ansicolor_stderr_sink
    template <typename ConsoleMutex>
    SPDLOG_INLINE ansicolor_stderr_sink<ConsoleMutex>::ansicolor_stderr_sink(color_mode mode) : ansicolor_sink<ConsoleMutex>(stderr, mode)
    {
    }

}  // namespace sinks
}  // namespace spdlog
